【摘要】 本文建立了一种计算喷射压力(油嘴蓄压腔压力)和喷射率的新方法,主要特点是无需已知喷孔处的流通特性(如流量系数等),而是通过实测的油管两端压力和针阀升程就可以计算出喷射压力和喷射率。为了提高计算精度,在计算中考虑了牵连速度和音速变化等因素的影响,建立了处理残余空泡的计算模型。更多还原

【Abstract】 This paper presents a new method of calculating the injection pressure (i.e. pressure in the injector nozzle accumulator) and the injection rate. The method is characterized by finding out the injection pressure and the injection rate with measured pressures at two ends of injection pipe and needle lift, without giving the flow property at the injection orifice (e.g. flow coefficient, orifice numbers and orifice diameter etc). To achieve precision in calculation, consideration is also given to the effect of the transportation velocity and the sonic velocity variation etc on characteristic curves, thereby established a model for calculating the cavitation.更多还原